♻️ refactor(toolregistry): clean up imports in class_tool_integration

- remove duplicate imports of `Type` and `Union` for simplification
- adjust import order and add `Optional` for improved readability

Author: Oaklight

src/toolregistry/class_tool_integration.py

@@ -13,14 +13,11 @@
     ['MyClass.method1', 'MyClass.method2', ...]
 """
 
-from typing import Type, Union
+from typing import Optional, Type, Union
 
 from .tool_registry import ToolRegistry
 
 
-from typing import Type, Optional, Union, Protocol, Callable
-
-
 def _is_all_static_methods(cls: Type) -> bool:
     """
     Determines if all the methods of a given class are static methods.